I put the "Rugged Radios" 60 watt radio in mine and have had decent experiences with it. We tested it in thick timber with smaller hills(maybe 50') and it worked out to a little over 2 miles, which was as far as we tested it.
I just have the sport roof installed without any of the roof interior panels so I installed it in the middle of the square steel tube that runs across the front of the roll cage, ran the wires up the pillar and mounted the magnetic mic mount to the roof.
If you do get a radio, make sure you DO NOT coil up the extra antenna cable. If you have extra cable, which I did, they suggested running the cable back and forth on the roll cage with out coiling it, or you could cut it and put a new end on it. Ground the antenna if you do not mount it to a steel roof. I also put the antenna on the back of the roof where the roof is kind of at a 45 degree angle, aiming backwards so branches would bounce off it easier.